The amendment to the register was listed in the State's official records publication Iris Oifigiúil on November 24 and the changes will be updated on the Oireachtas website.

Members are permitted to update the register at any time and Mr Barry has not broken any rules.

Accounts have not been filed for two of the companies, while the most recent accounts lodged with the Companies Registration Office by Biogold Limited, which were audited by Deloitte & Touche, show no transactions for 2014.

Last year's Dáil register of members' interest shows Mr Barry is a director of a management company relating to nine houses and apartments he owns in Cork.

He is also the owner of several agricultural sites and employs a number of people.

Mr Barry is one of a number of TDs, senators and councillors who have been contacted by RTÉ Investigates in recent weeks over the register of members' interest.

Fine Gael recently added a third candidate, former Labour Party councillor Noel McCarthy, to run alongside Mr Barry and the party's other sitting TD in the constituency David Stanton in Cork East.